The battery-powered device allows doctors to medicate patients whose veins are not accessible or have collapsed, such as children in distress or drug users. The technology allows medication and fluids to reach a patient’s circulatory system within 10 to 30 seconds.

It can be used in cases of cardiac arrest, emergency treatment, disasters, hematology and oncology treatments and spinal procedures.

Vidacare’s chief called the 2 million sales significant.

“It illustrates the value and continued acceptance of IO as a way to save patients’ lives,” said Mark Mellin, Vidacare’s president and CEO.

Since the company launched operations in 2001, the IO technology has been used by 90 percent of advanced life support ambulances nationwide and more than half of the emergency departments across the country. The U.S. military also uses the device.